Mold for casting hollow concrete structures



Jan, 2, 1923., 11,44,38

H. EDON-BROWN. Mow FOR CASTING HOLLOW CONCRETE STRUCTURES.

FILED JAN-'6. 192l- 2 SHEETSSHEET I Kh Fig.1

11,44s@,3&@

2 SHEETS'SHEET '1 Jam, 2, 1923.

H. EDON-BROWN Mom FOR CASTING HOLLOW CoNcRz r; Smucrureas.

FILED JAN. 6, 1921 a W 7 Z 4 a g n o f mm b .1 m w 2E .iwiiilllliilfilli H k! 0 w .90 M N K w 2 m c 0 1c 0 a EDON-BROVJN, 0F VIESTMINSTER, LONDON, ENGLAND.

MQLD FOE'CI-lfiTING- HOLLOW CONCRETE STRUCTURES.

Application filed January 6, 1921. Serial No. 435.536.

To all whom it may concern Be it known that l, Hansen EBON- BROWN, a subject of the King of Great Britain and Ireland, residing at 1 Carteret Street, li estminster, London, England, have invented cert-ain'new and useful Improvements in Molds for Casting Hollow Concrete Structures, of which the following is a specification.

This invention relates to molds employed for casting hollow concrete and like structures such as walls, and is primarily intended for use in casting hollow concrete walls in situ.

The usual practice employed in casting walls in situ necessitates the use of a large amount of tormwor: or shuttering, be

tween which the concrete is poured in a comparatively semi-liquid condition, the said shuttering having to be maintained in position until the concrete has set suiticiently to maintain its form. T his method is open to the objection that the cost of tormwork is high and the time of erection is comparatively. long.

In casting walls with the molds constructed in accordance with this invention the; concrete-is placed in the molds in a comparatively dry condition and is tamped; the mold is immediately then stripped in a horizontal direction and the next length of wall is then cast. When each horizontal. course is completed, the mold is raised and placed upon the course previously cast, and the next course is then cast in successive lengths, the joints in successive courses being preferably staggered.

The molds constructed in accordance with this invention are of the type adapted tobe stripped horizontally and comprise a core which is attached to an end member carrying side members" which .yield sui'hciently when the mold is unclamped to facilitate their withdrawal from the cast length oi wall. The core is of thecollapsible type andaccording to this invention is so con structed by hingii or by elasticity of the parts that when the sides. oi? the mold clamped together for casting, its sidesparallel, but when the clampingineans are released its. sides become. slightly. inclinedwith reference to each other to facilltate.

stripping from the work.

The. clamping is ell pair-0'3 arms which enga' eat one.end.cam-

. 4 plates-attached to the side memoers of the are.

ected by :means of a mold and which are connected near. their centres by a cross shaft which carries the core-expanding mechanism. arms at their other ends is mounted a sh attt carrying one or more rollers adapted to ride over the top surface of the work previously cast-and to facilitate the horizontal move ment of the mold to its next position. Elimilar rollers are attached to the fixed end ot the mold.

The free end of the core pro'\'*ided with a cutaway portion. or portions to enable concrete cross-ties to be cast between the two walls. To facilitate the formation oi? these cross-ties, a false-core. preii'erably collapsible, is inserted in the cavity at the end of the length of wall previously cast.

As is usual in inoldsot this type, the side.

membersare placed so as slightly to over lapat their inner surfaces the lower surface on to which the concrete is being cast, and in order to facilitate the horizontal withdrawal of these overlapping portions a portion of the outside members'ot the mold towards the fixed ends may he hinged to the main portion in accordance with our invention and the opening and closingot these hinged portions may be effected from the clamping arms.

In the accompanying drawings, which illustrate the preferred form of mold constructed in accordance with 'our invention.

Fig. 1 represents an elevation of the mold with the parts shown in the inoperative or unclamped position.

' Fig. 2 representsa plan with a portion oi the core-sheathing removed.

F 3 represents an elevation of the front portion of the core, partly in section to expose the coreecollapsing mechanism.

Fig. t represents an end view partly in section upon the line of Fig. 2.

The end member (0 consisting of a hoznrd or plate has attached thereto side members h and the core 0; the latterconsists ot'boards or plates 0 held when in opera t ive or clamped position parallel to each other. To preventconcrete or the like from getting between these plates o sheet metal. or likev covers adapted to slide'iovereachf other are preferably provided;

The clamping arnisf consist conveniently of bars of angle section and are secured against rotation relatively to" a cross-shaft 7c whlch operates the core-expandingniechaa' nisnrj. ,These .bai scoop ratewitn" tas Between thesepercd notches (.Z in. angle bars (Z fixed to the side members 7) and serve to force the latter slightly outwards when the mold is in the Rollers j are carried by a shaft l 'carried between the front ends of the arms, when back ends of the latter areraised, the rollers rest upon the surface of the concrete pre viously cast and assist the. movement of the mold to the next operative position. Other rollers 9 may be mounted on the back of the end member a; to assist the movement of the mold along thebed surface. The back portions 6 of the lower parts of the side members indicated'in dotted lines may be hinged at their upper edges so that they may be folded upwards to prevent friction with the side surfaces of the lower layer of concrete or other surface upon which the concrete is being cast. Cam plates 6 are mounted upon the side members Z2 and coact with the arms .f to clamp the mold inoperative position.

The core-expanding mechanism consists of a cam plate it provided with slots in which engage pins 0 carried between brackets 19 mounted in recesses in the inner sides of the plates 0'. The cam plate a is operated by a sheave-arm m pivoted between brackets 0 the sheave engaging. an eccentric 7" carried by the shaft 70.

It will be seen that downward movement of the clamping arms f in the counter-clockwise direction in Fig. 1 will clamp the side members" I) and will lift the cam plate n thus expanding the core. It will, of course, be understood that the relative angular movement of the side members and. core plates required to enable the mold to be stripped is quite small.

In order to facilitate the filling of the mold a hopper it may be fixed to the back upper surface thereof.v

Although the mold is primarily intended for casting walls in situ thus giving a monolithic or jointless construction, it 'may be employed if desired for casting successively separate blocks open. at one end. In this case end plates may be placed in the closed ends of the mold to keep separate block's formed by successive casting ins horizontal line;

-i i hat I claim is I v f:

1. In a mold for casting concrete and the like, a. vertical end member, vertical side members, clamping arms therefor, rollers carried on a transverseshaft mounted between the upper ends of said, arms and means for causing said rollers to bear upon- .the cast concrete to facilitate horizontal like, a vertical end member, vertical. side members, cam-plates carried by said side members,- supporting ears carried by said side members and projecting above them, clamping arms pivoted to said ears and coacting with said cam-plates, positive means for releasing the side membersafter casting and means for moving the mold horizontally to its next casting position.

3. Ina moldlfor casting concrete and the like a vertical. end member, vertical side members, cam plates carried by said side members, supporting ears carried by said side members and projecting above them, clamping arms pivoted to said ears and coacting with said cam-plates, lower-back, hinged portions on. said members, positive means for releasing the side members after casting, and means for moving the mold horizontally to its next casting position.

l; A mold for castingconcrete structures, comprising an end member, side members secured thereto, a collapsible core carried bythe end member, means for collapsing the core,rollers mounted on the end member, angle'bars secured to the side members extending above said. members and formed at the upper ends with cam slots,.'cam plates secured to the side members, a lever pivoted above the side members having clamping arms extending beyond said members and adapted to engage the cam plates for holding the side members in'mold forming position in one position thereof, the arms having their free uppei'ends connected by a barcarrying rollers,the'movementof the lever and arms to another position operatingto release the side members by the engagement of the arms in the cam slots of the angle bars, said movement also operating the core collapsing meansto collapsethe' core and for project- 7 ing the rollers carried bythe bar into engagement with a wall surface, so that said rollers and the rollers on the end member will facilitate the movement of the mold on thewall."

5. A mold for casting concretestructures, 115 comprising an an member, side members secured thereto, a collapsible core carried by the end member, cam members secured to the side members, a lever pivoted above the side members carrying rollersat the outer 130 free end thereof, the lever being formed to engage the cam members on the side 'members, and rollers carried by the end aeoeeo time positioning said rollers to engage the upper face oi: the wall "formed. for facilitating the movement of the mold.

6. A mold for concrete structures, comprising an end member, side members, pairs of cam members carried by the side members, a lever mounted for pivotal movement, and means for facilitating the movement of the mold on the formed Wall controlled by said lever, the lever being adapted in movement in one direction to lock the side members together in mold forming position by engagement With one pair of cam members and in movement in the other direction to spring said side members ilWtLf from the formed Wall by engagement with the other pair of cam members, the lever at the same time operating said means for projecting it into operative position.

7. A mold for concrete structures, comprising an end member, side members secured thereto, a collapsible core carried by the end member, and a lever pivotally mounted for movement in one direction to clamp the side members and core member in mold forming position and on movement in the other direction to collapse the core and disengage the side members from the formed Wall.

8. In a mold for casting hollow concrete and like structures, vertical side members, a vertical end member, a collapsible core projecting from the ertical end member, clamping means, means for causing the side members to assume a position slightly inclined to each other when the clamping means is released, and means for moving the mold horizontally from one casting position to the next. V

In testimony whereof I alfix my signature.

HERBERT EDON-BROWN. 

